Texas Instruments DRV8303EVM Manual de usuario

User's Guide

SLVU983A–September 2013–Revised October 2013

DRV8303EVM User Guide

1 Introduction

The Medium Voltage Digital Motor Control (DMC) kit (see Figure 1), provides a great way to learn and

experiment with digital control of medium-voltage, brushless motors to increase efficiency of operation.

This user guide describes the kit contents and hardware details and explains the functions and locations

of switches and connectors present on the board. This guide also explains steps required to run the

DRV8303EVM using BLDC-InstaSpinGUI and motor control software projects supplied through control-

SUITE. The kit has three-phase power stage, DRV8303 capable of driving three-phase brushless DC

motors, and permanent magnet synchronous motors with following specification:

• 60-V DC max input voltage

• 20-A peak current per phase

Figure 1. DRV8303EVM

SLVU983A–September 2013–Revised October 2013 DRV8303EVM User Guide

Hardware Block Diagram

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WARNING

This EVM is meant to be operated only in a lab environment, and TI

does not consider this EVM to be a finished end-product fit for

general consumer use. This EVM must be used only by qualified

engineers and technicians familiar with the risks associated with

handling high voltage electrical and mechanical components,

systems, and subsystems. This equipment operates at voltages

and currents that can result in electrical shock, fire hazard, and

personal injury, if not properly handled or applied. Equipment must

be used with necessary caution and appropriate safeguards

employed to avoid personal injury or property damage. The user

has the responsibility to confirm that the voltages and isolation

requirements are identified and understood prior to energizing the

board or simulation, or both. When energized, do not touch the

EVM or components connected to the EVM.

2 Hardware Block Diagram

Figure 2 illustrates a typical motor drive system running from a DC power supply. The DRV8303 motor

control board has all the power and control blocks that constitute a typical motor drive system for a PMSM

or BLDC motor.

Figure 2. DRV8303EVM Kit Hardware Block Diagram

3 Hardware Macro Blocks

The motor control board is separated into functional groups (referred to as macro blocks) that enable a

complete motor drive system. The following list describes the macro blocks present on the board and their

functions:

• TMS320F28035 controller block with a built-in non-isolated XDS100 JTAG emulator

• DC bus connection PVDD and GND terminals that connect to an external 8 to 60-V DC lab supply,

making sure to observe correct polarity

2DRV8303EVM User Guide SLVU983A–September 2013–Revised October 2013

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TMS320F28035

3-Phase

Inverter

Plus

Low Side

Current

Sense

DRV8303

Micro-USB Connector

Speed Control

POT

Header for unused pins

DC Power Input

3-phase Motor

Input

XDS100 JTAG

Emulator

QEP Header

HALL Sensor Header Control Power Supply

SW1

SW2

Switches to

control boot

options

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Quick Start GUI

• Micro-USB connector for serial communication with external PC or laptop to run GUI and download

software to onboard MCU

• DRV8303 module that includes DRV8303 three-phase pre-driver as well as all of the necessary

external passive components

• On-board control power supply of 5 V and 3.3 V

• Current sense, which is a low-side shunt current sensing on each half-bridge

• Quadrature encoder connections are available for an optional shaft encoder to interface to the QEP

peripheral of the MCU

• Hall effect sensor connections are available for optional Hall effect sensors

Figure 3. DRV8303EVM Kit Hardware Macro Blocks

4 Quick Start GUI

The InstaSPIN-BLDC GUI provides a convenient way to evaluate the functionality of the DRV8303 and the

F28035 device, without needing to learn and configure the underlying project software, or install Code

Composer Studio (CCS). The interactive interface uses knobs, sliders, buttons, text boxes, and graphs to

enable an easy demonstration of sensor-less trapezoidal commutation of BLDC motors.

4.1 Hardware Setup

The kit ships with switch settings pre-selected for connecting with the GUI. However, the user must ensure

that these settings are valid on the board.

NOTE: Do not apply power to the board before you have verified these settings.

1. Make sure nothing is connected to the board, and no power is supplied to the board.

2. Make sure that the following switches (SW1 and SW2) are set on the board as follows, to enable boot

from flash and connection to the SCI.

(a) SW1: OFF (down) position

SLVU983A–September 2013–Revised October 2013 DRV8303EVM User Guide

Quick Start GUI

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(b) SW2: position one is ON (up) and position two is ON (up)

3. Connect a USB cable from J10 (on the board) to the host computer. LED1 on the board lights up

indicating that the USB is powered. Windows®then searches for a driver for the device. Windows®

should locate the driver successfully, if the computer has CCS version 5, or prior versions, installed

which support XDS100 emulator. If the driver is not found, an installation prompt appears for the driver.

For installing the driver for USB to serial, do not let Microsoft®search for the driver. Instead download

the DRV8303EVM hardware and software folder from TI.com. Browse to the following location in the

folder <DRV8303EVM Hardware and Software\USB Driver\XDS100 Drivers v1.0>. Windows®should

now be able to find and install the driver. If Windows®still does not find the driver, repeat the process

and point to the location pointed out previously. You may have to reboot the computer for the drivers to

come into effect. Once installed, check if the installation completed properly by browsing to control

panel > system > hardware > device manager and look for USB serial port under ports (COM & LPT).

Make note of this port number.

Windows should

4. Select the motor to spin and connect to the PH A, PH B, and PH C terminals on the board.

5. Connect an 8 to 60-V DC power supply at connector J3 between VM and GND.

6. Once the power is connected, the board powers up and LED3 (STATUS) on the DRV8303EVM board

becomes green.

4.2 Software Setup

The QSG GUI (InstaSPIN-BLDC_GUI_DRV83xx_v104.exe) can be located in the DRV8303EVM

hardware and software folder from TI.com. Download the folder and browse to <DRV8303EVM Hardware

and Software\Application>. Once controlSUITE is installed, the GUI can also be found at the following

location: controlSUITE\development_kits\DRV830x-HC-C2-KIT_v104\~GUI.

The GUI requires Microsoft®.NET framework 3.5 SP1, or higher, to run. Please ensure this software is

installed before running this program. The kit ships with pre-flashed TMS320F28035 with the code that

enables interface to this GUI.

The microcontroller flash image can be re-flashed using CCS, if needed. Use the following steps to re-

flash the TMS320F28035 microcontroller with the .out file provided in the DRV8303EVM Hardware and

Software Folder:

1. Download the latest version of Code Composer Studio from TI.com

2. Ensure that the following switches (SW1 and SW2) are both in the ON (up) position

3. Connect the micro-USB cable and appropriate power supply to the DRV8303EVM. (The VM power

supply must be applied in order to power the JTAG programmer.)

4. Enable the power supply

5. Launch CCS and remove all other projects

6. Go to view > target configurations > user defined

7. Verify the proper target configuration is set as default, or create a new target configuration for your

device

8. Skip the rest of this section, if your target configuration is already properly set up and set at the default

9. Go to target > new target configuration

10. For the filename, set “xds100v1-TMS320F28035.ccxml”

11. For a new target configuration, the typical connection type is “Texas Instruments XDS100v1 USB

Emulator”

12. In the device section, select the TMS320F28035 device

13. Save configuration

14. Verify no targets are under the projects folder

15. Right click the desired target configuration and select launch target configuration

16. Go to target > connect target

17. Go to target > load program… > [Select the supplied .out file]

18. Terminate all. (Use the red square in the debug box)

4DRV8303EVM User Guide SLVU983A–September 2013–Revised October 2013

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Quick Start GUI

19. The microcontroller is now flashed

20. Power cycle the board before connecting the GUI

21. Move the switch (SW1) back to the OFF position in order to connect to the GUI

4.3 Running the GUI

4.3.1 Switch and Connector Settings

Make sure both the switches and connector settings are set as described in Section 4.1.

4.3.2 Navigate to the GUI Window

Browse to and double click on InstaSPIN-BLDC_GUI_DRV83xx_v104.exe. The following GUI window

should pop up (see Figure 4).

Figure 4. GUI Start-Up

4.3.3 Connect to DRV8303EVM

The GUI should auto-detect and connect to your DRV8303EVM. If auto-connect fails, set up the

connection manually. Access the connection wizard through the connection menu. Click on "connect to

engine" to view a list of available targets. Now, set up the connection wizard dialog to match Figure 5 by

selecting Piccolo 28035 from the target list and serial for connection method. Use the correct COM port

number for your system. Find the COM port number by going to control panel > system > hardware tab >

device manager > ports(COM & LPT) and look for the port that is described as USB serial port or a similar

name. Select connect when done.

SLVU983A–September 2013–Revised October 2013 DRV8303EVM User Guide

Quick Start GUI

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Figure 5. GUI Setup Connection

4.3.4 Image Correction

If an incorrect image is flashed on the controller, the connection fails. In this case, TI recommends re-

flashing the controller with the correct image.

4.3.5 Common Controls and Board Status Indicators

Common controls and board status indicators are located at the bottom of the screen and include:

• Enable motor check box: The enable motor check box starts or stops the motor from running.

• Control mode drop-down box: Allows the selection of four different control modes.

– Duty cycle: The motor is commutated using the sensor-less algorithm, but is driven in an open-loop

duty cycle mode.

– Current: The motor is commutated using the sensor-less algorithm, and the current (torque) is

regulated using a PI controller. (Note: An unloaded motor rapidly accelerates to a very high speed

in this mode.)

– Velocity: The motor is commutated using the sensor-less algorithm, and the motor speed is

regulated using a PI controller. The output of the speed controller is a PWM duty cycle.

– Cascade: The motor is commutated using the sensor-less algorithm, and the motor speed is

regulated using a PI controller. The output of the speed controller is a motor current command,

which is regulated by a lower level current PI controller.

• Fault status: The on-screen LED turns red whenever there is a fault signaled by the DRV8303. To

reset this fault, ensure enable motor check box is unchecked and push the reset fault button

6DRV8303EVM User Guide SLVU983A–September 2013–Revised October 2013

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Quick Start GUI

• DC bus voltage: The measured DC bus voltage displays both digitally and graphically. The on-screen

LED has three states, which depend on whether the DC bus is in or out of range:

– Yellow: DC bus is less than the minimum value.

– Green: DC bus is within limits.

– Red: DC bus is more than the maximum value.

• Driver over-temperature warning: The state of the DRV830x OCTWn pin displays using an on-screen

LED. The LED has two states:

– Yellow: The DRV830x device temperature exceeds 130°C.

– Green: The DRV830x device temperature is lower than 130°C.

Figure 6. GUI Common Controls

4.3.6 Main GUI Tab Controls

The main GUI tab contains controls that vary the motor set points and view various feedbacks.

• The setpoint knob has a separate function for each control mode.

– Duty cycle: The knob adjusts the PWM duty cycle to the motor.

– Current: The knob adjusts the per-unit (PU) commanded current through the motor. Note: The

DRV830x-HC-EVMs have a measurable current range of ±82.5 A which is normalized to a ±1.0 PU

scale.

– Velocity: The knob adjusts the PU motor-commanded speed.

– Cascade: The knob adjusts the PU motor-commanded speed.

• The actual motor speed (RPM) is displayed through a digital display.

• The actual motor current (PU) is displayed using a linear gauge. The current increases with motor

load.

• The four graphs on the right display commutation and speed related data. Adjust the time scale of the

top three graphs by incrementing or decrementing the graph time scalar.

– Top graph: Displays the per-unit (PU) integrated motor flux

– Second graph: Displays the PU Phase-A BEMF waveform

– Third graph: Displays the PU Phase-A current waveform

– Fourth graph: Displays the motor speed in RPM; this graph runs in a continuous strip chart mode

and is not affected by the graph time scalar

• The flux threshold slider adjusts the commutation point of the motor.

• The settings tab contains parameters affecting motor start-up and control loop tuning.

SLVU983A–September 2013–Revised October 2013 DRV8303EVM User Guide

1Mechanical_rev 60 s

200 Hz X 3000 RPM 1PU

8 poles 1min

Electrical_rev

Quick Start GUI

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Figure 7. Settings Tab

• Start-up control: These parameters control how the motor initially ramps up under forced commutation.

The motor must spin and generate some BEMF in order for the sensor-less algorithm to latch on and

take over commutation.

– Start-up duty cycle: Sets the constant PWM duty cycle given to the motor during the forced

commutation ramp-up phase

– Start-up ramp time: Sets the time taken to complete the forced commutation ramp-up phase

– Ramp start speed: Sets the initial speed for the forced commutation ramp-up phase

– Ramp end speed: Sets the final speed for the forced commutation ramp-up phase

• Motor parameters

– Pole count: Choose the number of poles for the motor under test.

– Base electrical frequency: Sets the scaling of per-unit (PU) speed to motor electrical speed. Use

this equation for the settings shown prior:

• Current loop: These parameters are associated with the current control loop and are only active when

control mode is set to current or cascade. Current and cascade are the only modes which make use of

the current loop.

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Evaluation of Motor Control Software Projects through CCS

– Kp: Sets the proportional gain for the current controller

– Ki: Sets the integral gain for the current controller

– Start-up current: When current control is active the motor is driven with constant current rather than

a constant duty cycle during the forced commutation ramp up phase. This slider sets the current for

this phase

• Velocity loop: These parameters are associated with the velocity control loop. These parameters are

only active when control mode is set to velocity or cascade. Velocity and cascade are the only modes

which make use of the velocity loop.

– Kp: Sets the proportional gain for the velocity controller

– Ki: Sets the integral gain for the velocity controller

– Velocity loop limit

• In velocity control mode, the velocity loop limit slider sets the maximum PWM duty cycle to the

motor

• In cascade control mode, the velocity loop limit slider sets the maximum current to the motor

4.4 Shutting Down

When finished evaluating, uncheck the enable motor check box to stop the motor. When the motor comes

to a full stop, the GUI can be closed. Now, turn off the DC power supply.

WARNING

Because the capacitors are charged, the VM may remain on for a

couple of seconds, do not touch any parts on the board

immediately after shutdown.

5 Evaluation of Motor Control Software Projects through CCS

The hardware resource mapping for TMS320F28035 controller inside DRV8303EVM kit is exactly similar

to DRV8301-HC-C2-KIT. All the motor-control software projects supplied through controlSuite for

DRV8301EVM can be directly ported to DRV8303EVM without any modifications.

The following projects are currently available for the DRV8301-HC-C2-kit at

controlSUITE\development_kits\DRV830x-HC-C2-KIT_v104.

• PM_Sensorless: Sensorless field oriented control of permanent magnet motor

• BLDC_Int: Sensorless trapezoidal control of BLDC motors based on BEMF integration

5.1 Motor Control Experiment HW Setup Instructions

Follow the hardware setup instructions described previously in Section 4. except for the following change

in the SW1 setting. In order to enable JTAG connection, keep the switch SW1: ON (up) position.

5.2 Motor Control Experiment SW Setup Instructions

In order to build and run the prior projects using CCS, please refer to software setup for DRV8301-HC-C2-

Kit projects.

5.3 Additional Resources

For more information, download and install controlSUITE.

After controlSUITE install view:

• DRV830x-HC-EVM How to Run Guide: HW and CCS setup required for using projects

controlSUITE\development_kits \DRV830x-HC-EVMv*.*\~Docs

SLVU983A–September 2013–Revised October 2013 DRV8303EVM User Guide

Evaluation of Motor Control Software Projects through CCS

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• All the projects for different motors can be found at controlSUITE\development_kits \DRV830x-HC-

EVMv*.*\PM_Sensorless controlSUITE\development_kits \DRV830x-HC-EVMv*.*\BLDC_Int

• C2000 source code for the GUI project can be found at controlSUITE\development_kits \DRV830x-HC-

EVMv*.*\GUI_project

• Crosshairs embedded GUI .exe and project files can be found at controlSUITE\development_kits

\DRV830x-HC-EVMv*.*\~GUI

10 DRV8303EVM User Guide SLVU983A–September 2013–Revised October 2013

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